/*
 * Copyright 2014-2019 Netflix, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.netflix.spectator.spark;

import com.netflix.spectator.api.Id;

/**
 * Maps a name used for the metrics registry into an id for spectator.
 */
@FunctionalInterface
public interface NameFunction {
  /**
   * Return the id corresponding to the name, or null if the name cannot be mapped and the value
   * should be dropped.
   */
  Id apply(String name);
}
